why does Xcontrol cannot read global variable?

[ztyaner11]

In the block diagram of Facade.vi of Xcontrol, I read a gloable variable which is updated by another vi periodically, but the returned value in Xcontrol never change.

I changed the global variable as a shared varialbe, it works properly. So what's the different between global variable and shared variable in Xcontrol?

[ztyaner11]

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帖子被ztyaner11在03-26-2006 07:16 PM时编辑过了

[pauldavey]

I have only done a little work with XControls, and nothing with Shared Variables, so really this is just a guess.  XControls are "running" even in design mode.  Shared Variables can be available at design-time because they are based on an external source (perhaps an external program that is running somewhere).  Global variables are only able to be read/written in run mode.

Global Variables and Shared Variables are certainly completely different in how they operate and in what they can do.

[ztyaner11]

Yes, there does be some different between SV and Global variable, but I hope both of them can be read in Xcontrol.

[ztyaner11]

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